Exam-style question
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In an LC circuit, what happens at the resonant frequency?.
- A.The circuit has maximum impedance
- B.The circuit has minimum impedance
- C.The circuit does not respond to signals
- D.The circuit dissipates maximum power
Model answer
What a good answer should say
- The circuit has minimum impedance
Explanation
Why this works
At the resonant frequency, the inductive and capacitive reactances cancel each other, resulting in minimum impedance, allowing maximum current to flow.
Common mistake
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